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DNA Structure and Replication

DNA Structure and Replication
DNA with a G-C content of 50% will melt at approximately

70 °C
60°C
100 °C
90 °C

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DNA Structure and Replication
DNA can be sequenced by the

physical method
chain termination procedure
chemical method
both (a) and (b)

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DNA Structure and Replication
Overwinding or overtightening of DNA during replication is caused and removed by

Single stranded protein, DNAa
DNAb, gyrase
DNAb, DNA polymerase
DNAa, gyrase

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DNA Structure and Replication
What does ligase do during replication of DNA?

Joins nicks in DNA strands
Synthesizes the lagging strand
Digests mRNA when it is no longer needed
Makes copies of mRNA from DNA

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DNA Structure and Replication
What is the main damaging effect of UV radiation on DNA?

Dehydration
Single strand break
Depurination
Formation of thymine dimers

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DNA Structure and Replication
DNA replication in eukaryotes occurs only in

M phase
S phase
G1 phase
G2 phase

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